Fatimah, Is and Fadillah, Ganjar and Sahroni, Imam and Kamari, Azlan and Sagadevan, Suresh and Doong, Ruey-An (2021) Nanoflower-like composites of ZnO/SiO2 synthesized using bamboo leaves ash as reusable photocatalyst. Arabian Journal of Chemistry, 14 (3). ISSN 1878-5352, DOI https://doi.org/10.1016/j.arabjc.2020.102973.
Full text not available from this repository.Abstract
In this study, the synthesis of ZnO/SiO2 nanocomposites using bamboo leaf ash (BLA) and tested their photocatalytic activity for rhodamine B decolorization have been conducted. The nanocomposites were prepared by the sol-gel reaction of zinc acetate dihydrate, which was used as a zinc oxide precursor, with silica gel obtained from the caustic extraction of BLA. The effect of the Zn content (5, 10, and 20 wt%) on the physicochemical characteristics and photocatalytic activity of the nanocomposites was investigated. The results of X-ray diffraction, scanning electron microscopy, gas sorption, and transmission electron microscopy characterization confirmed the mesoporous structure of the composites containing nanoflower-like ZnO (wurtzite) nanoparticles of 10-30 nm in size dispersed on the silica support. Further, the nanocomposites were confirmed to be composed of ZnO/SiO2 by X-ray photoelectron spectroscopy analysis. Meanwhile, diffuse-reflectance UV-visible spectrophotometry analysis of the nanocomposites revealed band gap energies of 3.38-3.39 eV. Of the tested nanocomposites, that containing 10 wt% Zn exhibited the highest decolorization efficiency (99%) and fastest decolorization rate. In addition, the degradation efficiencies were not reduced significantly after five repeated runs, demonstrating the reusability of the nanocomposite catalysts. Therefore, the ZnO/SiO2 nanocomposite obtained from BLA is a promising reusable photocatalyst for the degradation of dye-polluted water. (C) 2020 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Research and Technology, National Research Board (KEMENRISTEK-BRIN), Republic of Indonesia, through the World Class Professor Program in 2020 (101.17/E4.3/KU/2020) |
| Uncontrolled Keywords: | ZnO nanoparticles; Biogenic silica; Nanoflower-like composite; Photocatalyst |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 10 Aug 2022 00:05 |
| Last Modified: | 10 Aug 2022 00:05 |
| URI: | http://eprints.um.edu.my/id/eprint/28435 |
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